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CVE-2017-7805 During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer
Description
During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 56 | earliest → < 56 | 56 |
| Firefox ESR 52.4 | earliest → < 52.4 | 52.4 |
| Thunderbird 52.4 | earliest → < 52.4 | 52.4 |
References
- RHSA-2017:2832 access.redhat.com
- 101059 www.securityfocus.com
- [debian-lts-announce] 20171101 [SECURITY] [DLA 1153-1] icedove/thunderbird security update lists.debian.org
- www.mozilla.org www.mozilla.org
- bugzilla.mozilla.org bugzilla.mozilla.org
- 1039465 www.securitytracker.com
- www.mozilla.org www.mozilla.org
- DSA-4014 www.debian.org
- www.oracle.com www.oracle.com
- www.mozilla.org www.mozilla.org
- DSA-3998 www.debian.org
- DSA-3987 www.debian.org
- GLSA-201803-14 security.gentoo.org
Timeline
- Published
- Last modified